[PATCH net-next v2 00/10] net: ethernet: ti: netcp: update and enable cpts support

[Grygorii Strashko]

Hi

The Keystone 2 66AK2HK/E/L 1G Ethernet Switch Subsystems contains The
Common Platform Time Sync (CPTS) module which is in general compatible with
CPTS module found on TI AM3/4/5 SoCs. So, the basic support for
Keystone 2 CPTS is available by default, but not documented and has never been
enabled inconfig files.

The Keystone 2 CPTS module supports also some additional features like time
sync reference (RFTCLK) clock selection through CPTS_RFTCLK_SEL register
(offset: x08) in CPTS module, which can modelled as multiplexer clock
(this was discussed some time ago [1]).

This series adds missed binding documentation for Keystone 2 66AK2HK/E/L
CPTS module and enables CPTS for TI Keystone 2 66AK2HK/E/L SoCs with possiblity
to select CPTS reference clock.

Patch 1: adds the CPTS binding documentation. CPTS bindings are defined in the
way that allows CPTS properties to be grouped under "cpts" sub-node.
It also defines "cpts-refclk-mux" clock for CPTS RFTCLK selection.
Patches 2-3: implement CPTS properties grouping under "cpts" sub-node with
backward compatibility support.
Patch 4: adds support for time sync reference (RFTCLK) clock selection from DT
by adding support for "cpts-refclk-mux" multiplexer clock.
Patches 5-9: DT CPTS nodes update for TI Keystone 2 66AK2HK/E/L SoCs.
Patch 10: enables CPTS for TI Keystone 2 66AK2HK/E/L SoCs.

I grouped all patches in one series for better illustration of the changes,
but in general Pateches 1-4 are netdev matarieal (first) and other patches
are platform specific.

Series can be found at:
 git@xxxxxxxxxx:~gragst/ti-linux-kernel/gragsts-ti-linux-kernel.git
branch:
 net-next-k2e-cpts-refclk

Changes in v2:
 - do reverse christmas tree in cpts_of_mux_clk_setup()
 - add ack from Richard Cochran

v1: https://lkml.org/lkml/2019/6/1/77

[1] https://www.spinics.net/lists/netdev/msg408931.html

Grygorii Strashko (10):
  dt-bindings: doc: net: keystone-netcp: document cpts
  net: ethernet: ti: cpts: use devm_get_clk_from_child
  net: ethernet: ti: netcp_ethss: add support for child cpts node
  net: ethernet: ti: cpts: add support for ext rftclk selection
  ARM: dts: keystone-clocks: add input fixed clocks
  ARM: dts: k2e-clocks: add input ext. fixed clocks tsipclka/b
  ARM: dts: k2e-netcp: add cpts refclk_mux node
  ARM: dts: k2hk-netcp: add cpts refclk_mux node
  ARM: dts: k2l-netcp: add cpts refclk_mux node
  ARM: configs: keystone: enable cpts

 .../bindings/net/keystone-netcp.txt           | 44 ++++++++++
 arch/arm/boot/dts/keystone-clocks.dtsi        | 27 ++++++
 arch/arm/boot/dts/keystone-k2e-clocks.dtsi    | 20 +++++
 arch/arm/boot/dts/keystone-k2e-netcp.dtsi     | 21 ++++-
 arch/arm/boot/dts/keystone-k2hk-netcp.dtsi    | 20 ++++-
 arch/arm/boot/dts/keystone-k2l-netcp.dtsi     | 20 ++++-
 arch/arm/configs/keystone_defconfig           |  1 +
 drivers/net/ethernet/ti/cpts.c                | 88 ++++++++++++++++++-
 drivers/net/ethernet/ti/cpts.h                |  2 +-
 drivers/net/ethernet/ti/netcp_ethss.c         |  9 +-
 10 files changed, 240 insertions(+), 12 deletions(-)

-- 
2.17.1